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Broadwell (microarchitecture) - Wikipedia

From Wikipedia, the free encyclopedia

Fifth generation of Intel Core processors

Broadwell Launched October 27, 2014; 10 years ago (October 27, 2014) Discontinued November 2018[1] Marketed by Intel Designed by Intel Common manufacturer CPUID code 0306D4h Product code QPI speeds 6.4 GT/s to 9.6 GT/s DMI speeds 4 GT/s L1 cache 64 KB per core L2 cache 256 KB per core L3 cache 2-6 MB (shared) L4 cache 128 MB of eDRAM (Iris Pro models only) Technology node 14 nm (Tri-Gate) Microarchitecture Haswell Instruction set x86-16, IA-32, x86-64 Extensions Cores GPUs Sockets Product code name Brand name Predecessors Successor Skylake (tock/architecture) Unsupported Haswell and Broadwell feature a Fully Integrated Voltage Regulator.

Broadwell (previously Rockwell) is the fifth generation of the Intel Core processor. It is Intel's codename for the 14 nanometer die shrink of its Haswell microarchitecture. It is a "tick" in Intel's tick–tock principle as the next step in semiconductor fabrication.[2][3][4] Like some of the previous tick-tock iterations, Broadwell did not completely replace the full range of CPUs from the previous microarchitecture (Haswell), as there were no low-end desktop CPUs based on Broadwell.[5]

Some of the processors based on the Broadwell microarchitecture are marketed as "5th-generation Core" i3, i5 and i7 processors. This moniker is however not used for marketing of the Broadwell-based Celeron, Pentium or Xeon chips. This microarchitecture also introduced the Core M processor branding.

Broadwell's H and C variants are used in conjunction with Intel 9 Series chipsets (Z97, H97 and HM97),[6] in addition to retaining backward compatibility with some of the Intel 8 Series chipsets.[citation needed]

Design and variants[edit]

Broadwell has been launched in three major variants:[7]

Instruction set extensions[edit]

Unusually for a "tick", Broadwell introduces some instruction set architecture extensions[16][17] not present in earlier versions of the Haswell microarchitecture:

Broadwell's Intel Quick Sync Video hardware video decoder adds VP8 hardware decoding[21] and hybrid encoding[22] support.[23] HEVC decode is achieved through a combination of the fixed function video decoder and shaders.[24] Also, it has two independent bit stream decoder (BSD) rings to process video commands on GT3 GPUs; this allows one BSD ring to process decoding and the other BSD ring to process encoding at the same time.[25]

Broadwell's integrated GPU supports on Windows Direct3D 11.2, OpenGL 4.4 (OpenGL 4.5 on Linux[26]) and OpenCL 2.0.[27][28][29] However, it is marketed as Direct3D-12-ready.[30] Broadwell-E introduced Intel Turbo Boost Max Technology 3.0.[31]

List of Broadwell processors[edit] Desktop processors[edit] Processor branding
and model Cores
(threads) GPU model CPU frequency TDP Graphics clock rate L3 cache L4 cache[a] Release
date Price
(USD) Socket Base Turbo Base Max Core i7 5775C 4 (8) Iris Pro 6200 3.3 GHz 3.7 GHz 65 W 300 MHz 1.15 GHz 6 MB 128 MB June 2, 2015 (2015-06-02)[32] $366 LGA
1150 Core i5 5675C 4 (4) 3.1 GHz 3.6 GHz 1.1 GHz 4 MB $276 "Broadwell-E" HEDT (14 nm)[edit] Embedded processors[edit] Processor branding
and model Cores
(threads) GPU model CPU frequency TDP Graphics clock rate L3
cache L4
cache[a] Release date Price
(USD) Socket Base Turbo Base Max Core i7 5775R 4 (8) Iris Pro 6200 3.3 GHz 3.8 GHz 65 W 300 MHz 1.15 GHz 6 MB 128 MB June 2, 2015 (2015-06-02)[32] $348 BGA
1364 Core i5 5675R 4 (4) 3.1 GHz 3.6 GHz 1.1 GHz 4 MB $265 5575R 2.8 GHz 3.3 GHz 1.05 GHz $244 Xeon E3 1284Lv4 4 (8) Iris Pro P6300 2.9 GHz 3.8 GHz 47 W 1.15 GHz 6 MB OEM 1278Lv4 2.0 GHz 3.3 GHz 800 MHz 1.0 GHz $546 1258Lv4 P5700 1.8 GHz 3.2 GHz 700 MHz — $481 Processor branding
and model Cores
(threads) GPU model Base
frequency Turbo frequency TDP cTDP down Graphics
clock rate L3
cache Release date Price
(USD) Single Core Dual Core Base Max
Core i7 5950HQ 4 (8) Iris Pro 6200 2.9 GHz 3.7 GHz — 47 W — 300 MHz 1.15 GHz 6 MB June 2015 $623 5850HQ 2.7 GHz 3.6 GHz — — 1.1 GHz $434 5750HQ 2.5 GHz 3.4 GHz — 600 MHz / 37 W 1.05 GHz $434 5700HQ HD 5600 2.7 GHz 3.5 GHz — $378 5650U 2 (4) HD 6000 2.2 GHz 3.2 GHz 3.1 GHz 15 W 600 MHz / 9.5 W 1 GHz 4 MB Q1 2015 $426 5600U HD 5500 2.6 GHz 600 MHz / 7.5 W 950 MHz $393 5557U Iris 6100 3.1 GHz 3.4 GHz 3.4 GHz 28 W N/A / 23 W 1.1 GHz $426 5550U HD 6000 2.0 GHz 3.0 GHz 2.9 GHz 15 W 600 MHz / 9.5 W 1 GHz $426 5500U HD 5500 2.4 GHz 600 MHz / 7.5 W 950 MHz $393 Core i5 5350H Iris Pro 6200 3.1 GHz 3.5 GHz — 47 W — 1.05 GHz June 2015 $289 5350U HD 6000 1.8 GHz 2.9 GHz 2.7 GHz 15 W 600 MHz / 9.5 W 1 GHz 3 MB Q1 2015 $315 5300U HD 5500 2.3 GHz 600 MHz / 7.5 W 900 MHz $281 5287U Iris 6100 2.9 GHz 3.3 GHz 3.3 GHz 28 W 600 MHz / 23 W 1.1 GHz $315 5257U 2.7 GHz 3.1 GHz 3.1 GHz 1.05 GHz $315 5250U HD 6000 1.6 GHz 2.7 GHz 2.5 GHz 15 W 600 MHz / 9.5 W 950 MHz $315 5200U HD 5500 2.2 GHz 600 MHz / 7.5 W 900 MHz February 2015[33] $281 Core i3 5157U Iris 6100 2.5 GHz — — 28 W 600 MHz / 23 W 1 GHz January 2015 $315 5020U HD 5500 2.2 GHz — — 600 MHz / 10 W 900 MHz March 2015 $281 5015U 2.1 GHz — — 850 MHz $275 5010U — — 900 MHz January 2015 $281 5005U 2.0 GHz — — 850 MHz $275 Pentium 3825U HD Graphics 1.9 GHz — — 2 MB March 2015 3805U 2 (2) — — 100 MHz 800 MHz Q1 2015 $161 Celeron 3755U 1.7 GHz — — $107 3205U 1.5 GHz — — $107 Core M Ultra Low Power Mobile Processors[edit] Processor
Branding & Model Cores
(Threads) GPU Model Programmable TDP[34]: 69–72  CPU Turbo Graphics Clock rate L3
Cache Release
Date Price
(USD) SDP[35][36]: 71  cTDP down[a] Nominal TDP[b] cTDP up[c] 1-core Normal Turbo
Core M (vPro) 5Y71 2 (4)[37] HD 5300 
(GT2)[38] 3.5 W 3.5 W / 600 MHz 4.5 W / 1.2 GHz 6 W / 1.4 GHz 2.9 GHz 300 MHz 900 MHz 4 MB October 27, 2014 (2014-10-27) $281 5Y70 — — 4.5 W / 1.1 GHz — 2.6 GHz 100 MHz 850 MHz September 5, 2014 (2014-09-05) Core M 5Y51 3.5 W 3.5 W / 600 MHz 6 W / 1.3 GHz 300 MHz 900 MHz October 27, 2014 (2014-10-27) 5Y31 4.5 W / 900 MHz 6 W / 1.1 GHz 2.4 GHz 850 MHz 5Y10c 4.5 W / 800 MHz 6 W / 1 GHz 2.0 GHz 800 MHz 5Y10a — — — 100 MHz September 5, 2014 (2014-09-05) 5Y10[39] 4 W / ? MHz
  1. When a cooler or quieter mode of operation is desired, this mode specifies a lower TDP and lower guaranteed frequency versus the nominal mode.[34]: 71–72 
  2. This is the processor's rated frequency and TDP.[34]: 71–72 
  3. When extra cooling is available, this mode specifies a higher TDP and higher guaranteed frequency versus the nominal mode.[34]: 71–72 
Processor branding
and model Cores
(threads) Base
frequency Turbo
frequency TDP Socket Memory L3
cache Release date Price
(USD) Single core All cores Type Channel
Xeon D D-1587 16 (32) 1.7 GHz — 2.3 GHz 65 W FCBGA 1667 DDR4
up to
128 GB
w/ ECC
support Dual 24 MB Q1 2016 $1754 D-1577 1.3 GHz 2.1 GHz 45 W Q1 2016 $1477 D-1571 1.3 GHz 2.1 GHz Q1 2016 $1222 D-1567 12 (24) 2.1 GHz 2.7 GHz 65 W 18 MB Q1 2016 $1299 D-1559 1.5 GHz 2.1 GHz 45 W Q2 2016 $883 D-1557 1.5 GHz 2.1 GHz Q1 2016 $844 D-1553N 8 (16) 2.3 GHz 2.7 GHz 65 W 12 MB Q3 2017 $855 D-1548 2.0 GHz 2.6 GHz 45 W Q4 2015 $675 D-1543N 1.9 GHz 2.4 GHz Q3 2017 $652 D-1541 2.1 GHz 2.7 GHz Q4 2015 $581 D-1540 2.0 GHz 2.6 GHz Q1 2015 $581 D-1539 1.6 GHz 2.2 GHz 35 W Q2 2016 $590 D-1537 1.7 GHz 2.3 GHz Q4 2015 $571 D-1533N 6 (12) 2.1 GHz 2.7 GHz 45 W 9 MB Q3 2017 $470 D-1531 2.2 GHz 2.7 GHz Q4 2015 $348 D-1529 4 (8) 1.3 GHz 1.3 GHz 20 W 6 MB Q2 2016 $324 D-1528 6 (12) 1.9 GHz 2.5 GHz 35 W 9 MB Q4 2015 $389 D-1527 4 (8) 2.2 GHz 2.7 GHz 6 MB Q4 2015 $259 D-1523N 2.0 GHz 2.6 GHz 45 W Q3 2017 $256 D-1521 2.4 GHz 2.7 GHz Q4 2015 $199 D-1520 2.2 GHz 2.6 GHz Q1 2015 $199 D-1518 2.2 GHz 2.2 GHz 35 W Q4 2015 $234 D-1513N 1.6 GHz 2.2 GHz Q3 2017 $192 Pentium D D1519 1.5 GHz 2.1 GHz 25 W Q2 2016 $200 D1517 1.6 GHz 2.2 GHz Q4 2015 $194 D1509 2 (2) 1.5 GHz TBA 19 W 3 MB $156 D1508 2 (4) 2.2 GHz 2.6 GHz 25 W $129 D1507 2 (2) 1.2 GHz TBA 20 W $103 Single/dual socket CPUs[edit] Processor
branding and model Cores
(threads) CPU clock rate L3
cache TDP Release
date Release
price Sockets Memory

Support

Normal Turbo
Xeon E5 v4 2699A v4 22 (44) 2.4 GHz 3.6 GHz 55 MB 145 W Q2 16 $4938 2 DDR4
1600/1866/2133/2400
with ECC

(Note: 2696 v4 and


2686 v4 additionally
supports, DDR3
1333/1600/1866
with ECC) 2699 v4 22 (44) 2.2 GHz 3.6 GHz 55 MB 145 W Q1 16 $4115 2698 v4 20 (40) 2.2 GHz 3.6 GHz 50 MB 135 W $3226 2697 v4 18 (36) 2.3 GHz 3.6 GHz 45 MB 145 W $2702 2697A v4 16 (32) 2.6 GHz 3.6 GHz 40 MB 145 W $2891 2696 v4 22 (44) 2.2 GHz 3.7 GHz 55 MB 150 W OEM 2695 v4 18 (36) 2.1 GHz 3.3 GHz 45 MB 120 W $2424 2690 v4 14 (28) 2.6 GHz 3.5 GHz 35 MB 135 W $2090 2689 v4 10 (20) 3.1 GHz 3.8 GHz 25 MB 165 W $2723 2687W v4 12 (24) 3.0 GHz 3.5 GHz 30 MB 160 W $2141 2686 v4 18 (36) 2.3 GHz 3.0 GHz 45 MB 145 W OEM 2683 v4 16 (32) 2.1 GHz 3.0 GHz 40 MB 120 W $1846 2680 v4 14 (28) 2.4 GHz 3.3 GHz 35 MB 120 W $1745 2667 v4 8 (16) 3.2 GHz 3.6 GHz 25 MB 135 W $2057 2660 v4 14 (28) 2.0 GHz 3.2 GHz 35 MB 105 W $1445 2658 v4 2.3 GHz 2.8 GHz $1832 2650 v4 12 (24) 2.2 GHz 2.9 GHz 30 MB 105 W $1166 2650L v4 14 (28) 1.7 GHz 2.5 GHz 35 MB 65 W $1329 2648L v4 1.8 GHz 2.5 GHz 75 W $1544 2643 v4 6 (12) 3.4 GHz 3.7 GHz 20 MB 135 W $1552 2640 v4 10 (20) 2.4 GHz 3.4 GHz 25 MB 90 W $939 DDR4
1600/1866/2133
with ECC 2637 v4 4 (8) 3.5 GHz 3.7 GHz 15 MB 135 W $996 DDR4
1600/1866/2133/2400
with ECC 2630 v4 10 (20) 2.2 GHz 3.1 GHz 25 MB 85 W $667 DDR4
1600/1866/2133
with ECC 2630L v4 1.8 GHz 2.9 GHz 55 W $612 2628L v4 12 (24) 1.9 GHz 2.4 GHz 30 MB 75 W $1364 2623 v4 4 (8) 2.6 GHz 3.2 GHz 10 MB 85 W $444 2620 v4 8 (16) 2.1 GHz 3.0 GHz 20 MB $417 2618L v4 10 (20) 2.2 GHz 3.2 GHz 25 MB 75 W $779 2609 v4 8 (8) 1.7 GHz 1.7 GHz 20 MB 85 W $306 DDR4
1600/1866
with ECC 2608L v4 8 (16) 1.6 GHz 1.7 GHz 50 W $363 2603 v4 6 1.7 GHz 1.7 GHz 15 MB 85 W $213 1680 v4 8 (16) 3.4 GHz 4.0 GHz 20 MB 140 W Q2 16 $1723 1 DDR4
1600/1866/2133/2400
with ECC 1660 v4 3.2 GHz 3.8 GHz $1113 1650 v4 6 (12) 3.6 GHz 4.0 GHz 15 MB $617 1630 v4 4 (8) 3.7 GHz 4.0 GHz 10 MB $406 1620 v4 3.5 GHz 3.8 GHz $294 Roadmap and history[edit]

On September 10, 2013, Intel showcased the Broadwell 14 nm processor in a demonstration at IDF. Intel CEO Brian Krzanich claimed that the chip would allow systems to provide a 30 percent improvement in power use over the Haswell chips released in mid-2013. Krzanich also claimed that the chips would ship by the end of 2013;[40] however, the shipment was delayed due to low yields from Intel's 14 nm process.[41]

On October 21, 2013, a leaked Intel roadmap indicated a late 2014 or early 2015 release of the K-series Broadwell on the LGA 1150 platform, in parallel with the previously announced Haswell refresh. This would coincide with the release of Intel's 9-series chipset, which would be required for Broadwell processors due to a change in power specifications for its LGA 1150 socket.[42][43]

On May 18, 2014, Reuters quoted Intel's CEO promising that Broadwell-based PCs would be on shelves for the holiday season, but probably not for the back-to-school shopping.[44]

Mobile CPUs were expected in Q4 2014 and high-performance quad-core CPUs in 2015. The mobile CPUs would benefit from the reduced energy consumption of the die shrink.[45][46]

On June 18, 2014, Intel told CNET that while some specialized Broadwell-based products would be out in Q4 2014, "broader availability" (including mobile CPUs) would only happen in 2015.[47]

As of July 2014[update], Broadwell CPUs were available to Intel's hardware partners in sample quantities.[48] Intel was expected to release 17 Broadwell U series family microprocessors at CES 2015.[49] Also, according to a leak posted on vr-zone, Broadwell-E chips would be available in 2016.[50]

On August 11, 2014, Intel unveiled formally its 14 nm manufacturing process, and indicated that mobile variants of the process would be known as Core M products. Additionally, Core M products were announced to be shipping during the end of 2014, with desktop variants shipping shortly after.[51]

With Broadwell, Intel focused mainly on laptops, miniature desktops, and all-in-one systems.[52] This left traditional desktop users with no new socketed CPU options beyond fourth-generation Haswell, which first arrived in 2013. Even though the company finally introduced two Broadwell desktop chips in the summer of 2015, it launched its high-end sixth-generation Skylake CPUs very shortly thereafter. In September 2015, Kirk Skaugen, senior vice president and general manager of Intel's Client Computing Group, admitted that skipping desktops with Broadwell was a poor decision. Between the end-of-life for Windows XP in 2014 and the lack of new desktop chips, Intel had not given desktop PC users any good reasons to upgrade in 2015.[52]

On September 5, 2014, Intel launched the first three Broadwell-based processors that belong to the low-TDP Core M family, Core M 5Y10, Core M 5Y10a and Core M 5Y70.[53]

On October 9, 2014, the first laptop with Broadwell Intel Core M 5Y70 CPU, Lenovo Yoga 3 Pro, was launched.[54]

On October 31, 2014, four more Broadwell based CPUs were launched belonging to Core M Family, increasing the number of launched Broadwell CPUs to seven.[55]

On January 5, 2015, 17 additional Broadwell laptop CPUs were launched for the Celeron, Pentium and Core i3, i5 and i7 series.[56]

On March 31, 2016, Intel officially launched 14 nm Broadwell-EP Xeon E5 V4 CPUs.[57]

On May 30, 2016, Intel officially launched 14 nm Broadwell-E Core i7 69xx/68xx processor family.

  1. ^ a b Implemented as eDRAM and serving primarily to increase the performance of integrated GPU, while being shared with the CPU.
  1. ^ Perillo, Ron (November 9, 2017). "Intel Broadwell-E CPUs Officially Discontinued". eTeknix. Retrieved July 29, 2020.
  2. ^ "22nm Details" (PDF) (presentation). Intel. Retrieved January 4, 2012.
  3. ^ Demerjian, Charlie (March 31, 2011). "After Intel's Haswell comes Broadwell". SemiAccurate. Retrieved January 4, 2012.
  4. ^ Broekhuijsen, Niels (May 22, 2014). "Intel Broadwell CPUs to Arrive Later This Year". Tom's Hardware. Archived from the original on July 27, 2014. Retrieved May 31, 2014.
  5. ^ "Lower-end desktop CPUs won't get Broadwell, will need to wait for Skylake". Ars Technica. September 5, 2014.
  6. ^ Reynolds, Sam (August 26, 2013). "Intel's 9-series chipsets will support Broadwell". vr-zone.com. Archived from the original on November 20, 2013. Retrieved November 20, 2013.
  7. ^ a b c "Intel Broadwell Production Plan Leaked – BDW-H Delayed To May 2015". WCCFTech. May 21, 2014. Retrieved May 21, 2014.
  8. ^ a b "Intel's 14nm Process 'Broadwell' Lineup Details Leaked". WCCFTech. December 12, 2013. Retrieved December 12, 2013.
  9. ^ Cutress, Ian (June 3, 2014). "Intel Keynote at Computex 2014: 14nm Core-M, SoFIA, Devil's Canyon, DC P3700 and RealSENSE". AnandTech. Retrieved June 5, 2014.
  10. ^ a b Wasson, Scott (August 12, 2014). "Errata prompts Intel to disable TSX in Haswell, early Broadwell CPUs". The Tech Report. Retrieved March 23, 2016.
  11. ^ "Intel Broadwell GPUs to use HD 5x00, Iris 6100 and Iris Pro 6200 branding". cpu-world.com.
  12. ^ "Intel Broadwell Core i7-5775C and Core i5-5675C Processors With Iris Pro Graphics 6200 Detailed – Launching in Q2 2015". wccftech.com. March 23, 2015. Retrieved March 24, 2015.
  13. ^ Valich, Theo (January 10, 2014). "Intel Brickland & Grantley Platforms Revealed: Ivy Bridge-EX, Haswell-EX, Broadwell-EX". Vr-zone.com. Archived from the original on February 1, 2014. Retrieved January 19, 2014.
  14. ^ Novakovic, Nebojsa (January 10, 2014). "Socket 2011 to become the dominant Intel high end physical format even on Xeon EX – but different pin-outs, of course". Vr-zone.com. Archived from the original on February 1, 2014. Retrieved January 19, 2014.
  15. ^ Anton Shilov (May 25, 2015). "Skylake Purley: Intel Xeon E5 and E7 Platform Update". xbitlabs.com. Retrieved May 25, 2015.
  16. ^ "Intel Software Development Emulator". Intel Developer Zone. Software.intel.com. July 23, 2013. Retrieved October 16, 2013.
  17. ^ "Chapter 9: Additional New Instructions". Intel Architecture Instruction Set Extensions Programming Reference (PDF). July 2012. 319433-013b. Archived from the original (PDF) on October 6, 2024.
  18. ^ New Instructions Supporting Large Integer Arithmetic on Intel Architecture Processors (Document number 327831 -001) // Intel, August 2012
  19. ^ a b Intel C++ Composer XE 2013 for Windows* Installation Guide and Release Notes (Document number: 321414-004US) // Intel, October 4, 2012; section "3.2.4 Inline assembly and intrinsic support for Intel architecture code named Broadwell added to Composer XE 2013 Update 1", page 13
  20. ^ Mulnix, David (2016). "Intel Xeon Processor E5-2600 V4 Product Family Technical Overview | Intel Software". Retrieved December 13, 2019.
  21. ^ "VA-API 1.3 Readies Broadwell Support, Adds VP8 Decoding". Phoronix.com. March 18, 2014. Retrieved June 10, 2015.
  22. ^ "VA-API Adds Support For VP8 Video Encoding". Phoronix.com. July 19, 2014. Retrieved June 10, 2015.
  23. ^ "intel-hybrid-driver/README at edead0c17e2818bc0fee0ea644f85ab81bbe6f7a · intel/intel-hybrid-driver". GitHub. Retrieved December 31, 2023.
  24. ^ Smith, Ryan. "Intel Broadwell Architecture Preview: A Glimpse into Core M". Retrieved October 27, 2018.
  25. ^ "Intel Broadwell GT3 Graphics Have Dual BSD Rings". Phoronix.com. Retrieved April 17, 2014.
  26. ^ "Mesa 13.0 Released With Intel OpenGL 4.5, RADV Radeon Vulkan Driver". www.phoronix.com.
  27. ^ "Intel Iris, Iris Pro, and HD Graphics Production Driver for Windows 7, 8.1, & 10". Intel Download Center.
  28. ^ "Release notes for driver version 15.40.48.5171" (PDF).
  29. ^ "Intel Developer Zone". Intel.
  30. ^ Cutress, Ian. "Broadwell GPU Improvements". Retrieved November 24, 2015.
  31. ^ "Intel Broadwell-E HEDT Core i7 Processors Launching on 30th May - Official Prices and Specifications Confirmed". May 27, 2016.
  32. ^ a b "Intel launches Broadwell-H chips for desktops and laptops, but world waits for 'Skylake'". Retrieved June 2, 2015.
  33. ^ "Aldi verkoopt laptop met processor van de 5de generatie". February 17, 2015. Retrieved February 18, 2015.
  34. ^ a b c d "4th Generation Intel Core processor based on Mobile M-Processor and H-Processor Lines Datasheet, Volume 1 of 2" (PDF). intel.com. December 2013. Retrieved December 22, 2013. Configurable TDP (cTDP) and Low-Power Mode (LPM) form a design vector where the processor behavior and package TDP are dynamically adjusted to a desired system performance and power envelope. [...] With cTDP, the processor is now capable of altering the maximum sustained power with an alternate guaranteed frequency. Configurable TDP allows operation in situations where extra cooling is available or situations where a cooler and quieter mode of operation is desired.
  35. ^ "The technical details behind Intel's 7 Watt Ivy Bridge CPUs". arstechnica.com. January 14, 2013. Retrieved December 22, 2013. If the CPU needs to work hard for an extended period of time and the laptop gets warmer, it will slowly ramp down its speed until it's operating at its stated TDP. [...] There are two OEM-configurable "power level" states that define how quick the CPU can be in these situations: PL2 tells the processor how much power it's allowed to use when it needs a short burst of speed, and PL1 defines how quickly the processor can run under sustained load. [...] This is at the heart of what Intel is doing with the Y-series processors: their maximum TDP has been lowered four watts, from 17 to 13. Intel is also validating them for use at two lower PL1 values: 10 watts and 7 watts. This is where the marketing we discussed earlier comes in—rather than keeping these values under the covers as it has so far been content to do, Intel has taken that lowest value, put it on its product pages, and called it SDP.
  36. ^ "4th Generation Intel Core processor based on Mobile U-Processor and Y-Processor Lines Datasheet, Volume 1 of 2" (PDF). intel.com. December 2013. Retrieved December 22, 2013.
  37. ^ Ian Cutress. "Intel's Core M Strategy: CPU Specifications for 9mm Fanless Tablets and 2-in-1 Devices". Retrieved January 6, 2015.
  38. ^ "Intel launches three Core M CPUs, promises more Broadwell "early 2015"". Ars Technica. September 5, 2014. Retrieved January 6, 2015.
  39. ^ "Details of first Broadwell "Y" mobile processors". cpu-world.com. July 2014. Retrieved January 6, 2015.
  40. ^ "Intel reveals 14nm PC, declares Moore's Law 'alive and well'". The Register. September 10, 2013. Retrieved September 28, 2014.
  41. ^ "Intel delays Broadwell PC chip production to early next year". CNET. October 15, 2013. Retrieved September 28, 2014.
  42. ^ "Intel's Broadwell-K launching at end of 2014 according to new roadmap". vr-zone.com. October 21, 2013. Archived from the original on October 24, 2013. Retrieved October 24, 2013.
  43. ^ Shilov, Anton (August 29, 2013). "Intel Changes Plans: Core i "Broadwell" Processors Will Be Available in LGA Packaging, But There Is a Catch". Xbit Labs. Archived from the original on October 25, 2013. Retrieved October 24, 2013.
  44. ^ "Exclusive: Intel CEO promises Broadwell PCs on shelves for holidays". Reuters. May 18, 2014. Archived from the original on May 18, 2014. Retrieved May 17, 2014.
  45. ^ "Computex 2014: Intels Broadwell kommt rechtzeitig zum Weihnachtsgeschäft". Heise.de. May 22, 2014. Retrieved May 31, 2014.
  46. ^ Chris.L (May 19, 2014). "2014 年底前絕對見到，14nm Broadwell 處理器最快在 37 周出貨". chinese.vr-zone.com. Archived from the original on May 14, 2015. Retrieved July 19, 2014.
  47. ^ Crothers, Brooke. "Intel's next-gen processor, Broadwell, is (mostly) a 2015 thing". CNET. Retrieved July 19, 2014.
  48. ^ Mark Hachman (July 15, 2014). "Intel shipping Broadwell, but next-gen Skylake chip could slip". PCWorld. Retrieved July 19, 2014.
  49. ^ "Intel to launch Broadwell "U" series CPUs at CES 2015". www.cpu-world.com.
  50. ^ "Intel's Extreme Broadwell-E chips reportedly not coming until early 2016". PC Gamer. October 22, 2014.
  51. ^ Hachman, Mark (August 11, 2014). "Intel aims next-gen 14nm 'Broadwell' technology at fanless tablets, Ultrabooks". PCWorld. Retrieved August 15, 2014.
  52. ^ a b "Intel regrets skipping Broadwell desktop CPUs". September 15, 2015. Retrieved October 10, 2015.
  53. ^ "Intel launches first Broadwell processors". www.cpu-world.com.
  54. ^ "The first Core M laptop paints a depressing, mediocre picture for Intel's Broadwell - ExtremeTech". ExtremeTech.
  55. ^ "Intel to release Core M 5Y10c, 5Y31, 5Y51 and 5Y71 processors". www.cpu-world.com.
  56. ^ "Broadwell U arrives: Faster laptop CPUs and GPUs from Core i7 to Celeron". ArsTechnica. January 5, 2015.
  57. ^ Johan De Gelas. "The Intel Xeon E5 v4 Review: Testing Broadwell-EP With Demanding Server Workloads". anandtech.com.

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